Bitcoin Core  26.99.0
P2P Digital Currency
undo.h
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1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2020 The Bitcoin Core developers
3 // Distributed under the MIT software license, see the accompanying
4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
5 
6 #ifndef BITCOIN_UNDO_H
7 #define BITCOIN_UNDO_H
8 
9 #include <coins.h>
10 #include <compressor.h>
11 #include <consensus/consensus.h>
12 #include <primitives/transaction.h>
13 #include <serialize.h>
14 
23 {
24  template<typename Stream>
25  void Ser(Stream &s, const Coin& txout) {
26  ::Serialize(s, VARINT(txout.nHeight * uint32_t{2} + txout.fCoinBase ));
27  if (txout.nHeight > 0) {
28  // Required to maintain compatibility with older undo format.
29  ::Serialize(s, (unsigned char)0);
30  }
31  ::Serialize(s, Using<TxOutCompression>(txout.out));
32  }
33 
34  template<typename Stream>
35  void Unser(Stream &s, Coin& txout) {
36  uint32_t nCode = 0;
37  ::Unserialize(s, VARINT(nCode));
38  txout.nHeight = nCode >> 1;
39  txout.fCoinBase = nCode & 1;
40  if (txout.nHeight > 0) {
41  // Old versions stored the version number for the last spend of
42  // a transaction's outputs. Non-final spends were indicated with
43  // height = 0.
44  unsigned int nVersionDummy;
45  ::Unserialize(s, VARINT(nVersionDummy));
46  }
47  ::Unserialize(s, Using<TxOutCompression>(txout.out));
48  }
49 };
50 
52 class CTxUndo
53 {
54 public:
55  // undo information for all txins
56  std::vector<Coin> vprevout;
57 
59 };
60 
63 {
64 public:
65  std::vector<CTxUndo> vtxundo; // for all but the coinbase
66 
67  SERIALIZE_METHODS(CBlockUndo, obj) { READWRITE(obj.vtxundo); }
68 };
69 
70 #endif // BITCOIN_UNDO_H
Undo information for a CBlock.
Definition: undo.h:63
std::vector< CTxUndo > vtxundo
Definition: undo.h:65
SERIALIZE_METHODS(CBlockUndo, obj)
Definition: undo.h:67
Undo information for a CTransaction.
Definition: undo.h:53
std::vector< Coin > vprevout
Definition: undo.h:56
SERIALIZE_METHODS(CTxUndo, obj)
Definition: undo.h:58
A UTXO entry.
Definition: coins.h:32
CTxOut out
unspent transaction output
Definition: coins.h:35
uint32_t nHeight
at which height this containing transaction was included in the active block chain
Definition: coins.h:41
unsigned int fCoinBase
whether containing transaction was a coinbase
Definition: coins.h:38
void Serialize(Stream &, V)=delete
#define VARINT(obj)
Definition: serialize.h:513
void Unserialize(Stream &, V)=delete
static Wrapper< Formatter, T & > Using(T &&t)
Cause serialization/deserialization of an object to be done using a specified formatter class.
Definition: serialize.h:510
#define READWRITE(...)
Definition: serialize.h:156
Formatter for undo information for a CTxIn.
Definition: undo.h:23
void Unser(Stream &s, Coin &txout)
Definition: undo.h:35
void Ser(Stream &s, const Coin &txout)
Definition: undo.h:25
Formatter to serialize/deserialize vector elements using another formatter.
Definition: serialize.h:672